AMC Model 20 12-Bolt Aluminum Differential Cover - Polished
This is a polished aluminum finned differential cover built for AMC Model 20 rear axle housings — the rear end used across Jeep CJ-series vehicles, AMC Javelin, AMC AMX, AMC Matador, and Jeep J-Series trucks. The AMC Model 20 uses a 12-bolt cover pattern with an 8-bolt ring gear — both specs should be confirmed against your axle before ordering, since the cover bolt count and ring gear bolt count differ and are often referenced independently when cross-shopping covers.
This listing is for the cover and drain plug only — gasket and mounting hardware are not included. If you need a complete installation kit, TSP also offers this cover as a kit with gasket and hardware included (SP4906KIT). Confirm your sealing method (cut gasket or RTV) and source hardware separately before starting installation.
The finned aluminum construction dissipates heat more effectively than a flat steel cover, helping reduce gear oil temperature during sustained trail, towing, or performance use. A polished finish adds show-quality appearance for builds where underbody aesthetics matter.
Polished Finned Aluminum Cover for the AMC Model 20 — Cover and Drain Plug Only
This finned aluminum differential cover is sized and bolted for AMC Model 20 rear axle housings with a 12-bolt cover pattern, finished in polished aluminum for a clean, show-quality appearance on CJ Jeep, AMC muscle car, and Jeep J-Series truck builds. A drain plug is included; gasket and mounting hardware are not.
Fins Dissipate Heat, Aluminum Saves Weight Over Stock Steel
Unlike a flat steel factory cover, the finned aluminum design increases surface area to help dissipate heat from gear oil during sustained use — trail driving, towing, or performance applications where the rear axle sees extended load. Aluminum construction also reduces unsprung weight compared to a steel cover.
COMPATIBLE WITH
AMC MODEL 20 12-BOLT REAR DIFFERENTIALS
• AMC Model 20 rear axle housings
• Factory AMC Model 20 rear differentials
• Jeep AMC Model 20 rear axle housings
• Aftermarket AMC Model 20 axle housings using the factory 12-bolt cover pattern
• Verify housing shape, bolt pattern, sealing rail, and fill configuration before ordering.
COMMON VEHICLE APPLICATIONS
AMC AMX
AMC Javelin
AMC Hornet
AMC Matador
AMC Pacer
AMC Concord
Jeep CJ5
Jeep CJ7
Jeep CJ8 Scrambler
Jeep Wagoneer
NOTES
• Fits AMC Model 20 12-bolt rear differential housings only.
• Verify axle model, housing shape, bolt pattern, sealing rail, and suspension clearance before installation.
• Gasket and mounting hardware are not included (cover-only version).
• Confirm RTV or gasket requirements before installation.
• Not compatible with Dana 44, Dana 60, Chrysler 8.25, Chrysler 9.25, Ford 8.8, Ford 9-inch, Ford Sterling, GM 10-bolt, GM 12-bolt, or GM 14-bolt differentials.
SPECIFICATIONS
Cover Material: Aluminum
Cover Design: Finned
Cover Bolts: 12
Ring Gear Bolts: 8
Filler Plug: Not Included
Drain Plug: Included
Gasket: Not Included
Hardware: Not Included
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
This is a polished aluminum finned differential cover built for AMC Model 20 rear axle housings — the rear end used across Jeep CJ-series vehicles, AMC Javelin, AMC AMX, AMC Matador, and Jeep J-Series trucks. The AMC Model 20 uses a 12-bolt cover pattern with an 8-bolt ring gear — both specs should be confirmed against your axle before ordering, since the cover bolt count and ring gear bolt count differ and are often referenced independently when cross-shopping covers.
This listing is for the cover and drain plug only — gasket and mounting hardware are not included. If you need a complete installation kit, TSP also offers this cover as a kit with gasket and hardware included (SP4906KIT). Confirm your sealing method (cut gasket or RTV) and source hardware separately before starting installation.
The finned aluminum construction dissipates heat more effectively than a flat steel cover, helping reduce gear oil temperature during sustained trail, towing, or performance use. A polished finish adds show-quality appearance for builds where underbody aesthetics matter.
Polished Finned Aluminum Cover for the AMC Model 20 — Cover and Drain Plug Only
This finned aluminum differential cover is sized and bolted for AMC Model 20 rear axle housings with a 12-bolt cover pattern, finished in polished aluminum for a clean, show-quality appearance on CJ Jeep, AMC muscle car, and Jeep J-Series truck builds. A drain plug is included; gasket and mounting hardware are not.
Fins Dissipate Heat, Aluminum Saves Weight Over Stock Steel
Unlike a flat steel factory cover, the finned aluminum design increases surface area to help dissipate heat from gear oil during sustained use — trail driving, towing, or performance applications where the rear axle sees extended load. Aluminum construction also reduces unsprung weight compared to a steel cover.
COMPATIBLE WITH
AMC MODEL 20 12-BOLT REAR DIFFERENTIALS
• AMC Model 20 rear axle housings
• Factory AMC Model 20 rear differentials
• Jeep AMC Model 20 rear axle housings
• Aftermarket AMC Model 20 axle housings using the factory 12-bolt cover pattern
• Verify housing shape, bolt pattern, sealing rail, and fill configuration before ordering.
COMMON VEHICLE APPLICATIONS
AMC AMX
AMC Javelin
AMC Hornet
AMC Matador
AMC Pacer
AMC Concord
Jeep CJ5
Jeep CJ7
Jeep CJ8 Scrambler
Jeep Wagoneer
NOTES
• Fits AMC Model 20 12-bolt rear differential housings only.
• Verify axle model, housing shape, bolt pattern, sealing rail, and suspension clearance before installation.
• Gasket and mounting hardware are not included (cover-only version).
• Confirm RTV or gasket requirements before installation.
• Not compatible with Dana 44, Dana 60, Chrysler 8.25, Chrysler 9.25, Ford 8.8, Ford 9-inch, Ford Sterling, GM 10-bolt, GM 12-bolt, or GM 14-bolt differentials.
SPECIFICATIONS
Cover Material: Aluminum
Cover Design: Finned
Cover Bolts: 12
Ring Gear Bolts: 8
Filler Plug: Not Included
Drain Plug: Included
Gasket: Not Included
Hardware: Not Included
